Datasheet

MAX9708
20W/40W, Filterless, Spread-Spectrum,
Mono/Stereo, Class D Amplifier
10
Maxim Integrated
Typical Application Circuits/Functional Diagrams
OUTR+
OUTR-
OUTL-
OUTL+
SYNCIN
INL+
INL-
INR+
INR-
SHDN
G2
G1
SYNCOUT
PGND
R
IN
R
IN
R
IN
R
IN
V
BIAS
V
BIAS
TH0 TH1 TH2
TEMP
CPV
DD
PV
DD
PV
DD
PV
DD
PV
DD
PV
DD
V
DD
V
DD
C1P
C1N
REG
+
-
LEFT
CHANNEL
+
-
RIGHT
CHANNEL
V
DIGITAL
C2
1μF
C1
0.1μF
0.1μF
47μF*
1μF
1μF
1μF
1μF
C
REG
0.01μF
C
SS
0.47μF
V
DIGITAL
V
DIGITAL
V
DIGITAL
V
DIGITAL
GND
MONO
FS1
FS2
R
F
R
F
R
F
R
F
10kΩ
10kΩ
14
13
17
16
27
26
30
28
29
18
35 34 33
32
19, 20, 21
8
9
10
51, 52
53, 54
45, 46
47, 48
11
22, 23
2–4, 39–41 49–50
5–7, 36–38
25
15
SS
24
MUTE
31
*ADDITIONAL BULK CAPACITANCE
CONFIGURATION: TQFN STEREO MODE, SSM, INTERNAL OSCILLATOR, GAIN = 22dB, THERMAL SETTING = +120°C
MAX9708
GAIN
CONTROL
CONTROL
CHARGE
PUMP
REGULATOR
THERMAL SENSOR
MUX
CLASS D
MODULATOR
AND H-BRIDGE
CLASS D
MODULATOR
AND H-BRIDGE
Figure 1. Typical Application and Functional Diagram in Stereo Mode